Friction-clutch.



G. STAHL.

PRIGTION CLUTCH.

APPLICATION FILED JUNE ze, 1911.

1 ,062,860. Patented May 27, 1913.

2 SHEETS-SHEET l.

G. STAHL.

FRIGTION CLUTCH.

APPLIOATIOR nu :um: 2s, 1911.

Patented May`27, 1913.

2 SHEETS-SHEET 2.

UNITED STATES PALFENT OFFICE.

GEORGE STAHL, OF DAYTON, OHIO, ASSIGNOR TO THE EDG'EMONT MACHINE COMPANY, 0F DAYTON, OHIO, A CORPORATION OF OHIO.

FRICTION-CLUTCH.

Specification of Letters lagent.

Patented May 27, 1913.

Application filed Jiune 26, 1911. Serial No. 635,312.

To all whom t may concern.:

Be it known that I, GEORGE STAHL, a citizen of the United States, .residing at Dayton, in the county ofMontgomery and State of Ohio, have invented certain new and useful Improvements in Friction-Clutches, of .which the follow-ing is a specification.

My invention relates -to clutches, and particularly to friction clutches adapted to conneet a normally loose pulley with the drive shaft upon which the pulley is mountechbut which may be adapted to other purposes such as connecting a driving and driven shaft, etc.

The object of the invention is to provide in a friction clutch embodying a friction member adapted to be clamped between relatively movable clamping members, improved means for adjusting the clamping members, which will be cheap in construction, capable of being readily connected and disconnected to .permit access to the friction and clamping members, efficient in use, easily and quickly operated, positive in action and unlikely to get out of repair.

lith the above primary and other incidental objects in view as'will more fully i the-clutch.

appear in the specification, the invention conslsts of the features of construction, the parts and combinations thereof and the vmode of operation or their equivalents, as

hereinafter described and set forth in the claims.

Referring to the drawings. Figure l is a longitudinal sectional view through the assembled clutch. Fig. 2 is a side View of Fig. Si is a detail side elevation of the. friction ring removed from the pulley. Fig. l is a detail view of the clamping disk and clamping ring which engage the friction member. Fig. 5 is a detail view of lone of the bell levers employed to move the clamping ring into engagement with Athe friction ring. Fig. (5 is a detail view of a modification of the friction ring.

lLike, parts are indicated by similar charactors of reference throughout the several views.

ln the drawings l is the drive shaft upon which is looselv journaled a driven pulley 2. The pulley is so eonstructei'l that the pcripheral fiange 3 projects laterally from the .web 4 forming an annular recess within the,

ange 3. 'A bearing hub 5 projects in the opposite direction from the web 4. l Located in the inner periphery of the flange 3 are two or more key ways or grooves 6. Secured upon the shaft 1 and projecting' within the recess of the pulley 2 to a point- A.adjacent to the web 4 is a hub or collar 7 secured to the shaft l by means of set screws or a `key or other driving connection. Formed integral with the hub or collar 7 is a clamping disk 8, while slidingly mounted upon the hub or collar 7 is a movable clamp ring 9 adjustable to and from the fixed disk 8. It is to be understood 4that while the fixed disk 8 and the movable clamping ring 9 are `located Within the annular recess formed by the flange 3 of the pulley, such parts are entirely independent of the-.pulley. Interposed between the-fixed disk 8 and the movable clamping ring 9 is a. friction ring 10 having in the periphery thereof keys or splines 1l adapted to engage the key -.Ways or rgrooves 6' of the pulley 2. The friction ,ring l() is capable of lateral movement in relation to the pulley, the keys 0r splines 11 thereof sliding in the key Ways 6 of said pulley. The opposite faces of the friction ring 10 are covered with facings l()X of friction material, it having been found in practice that a friction surface formed of wire mesh charged with asbestos or other fibrous material being preferable. This coating of friction material is secured te the friction ring 10 by copper rivets 12 as shown in Fig. 3. Fixed upon the movable clamping ring 9 and projecting through suitable openings in the xed disk 8 are studs 125 about which are located'helical springs 1l intermediate the clamping rings t) and the fixed disk 8. The helical springs 1l tend to separate the clamping ring 9 and thc fixed disk 8 maintaining said parts out of contact with the interposed friction ring .10.

Pivoted to ears 15 formed .upon the fixed disk S are a. plurality of bell levers 16 the inner ends of which are bifurcated as shown at 17, within which bifurcation the stud 13 projects. The studs 13 are provided With heads or nuts 18 aty points beyond the engagement of the bell lever 16 with Said studs, whereby the bell levers upon oscilfation will engage such heads or nuts 18 movvlos;

ed upon movement to engage op osite sides when projected through the perforations of the friction member the com ination of and means for oscillating the levers, substuds carried by one of the clamping bodies stantially specified.

and projecting through perforations in the ln testimony whereof, I have hereunto st 5 oploltelmping fbody, heads on said Studs1 my hund this 17 day of June 1911.

sai ea s eing o less dimensions than the g w said perforations whereby said studs andi GEORGE STAHL l heads may be freely inserted in and re-l` Witnesses: moved from the perforations, and bifurcated i HARRY F. NoLAN, .0 operating levers engaging the stud headsl O. B. COFFMAN. 

